Tunable impedance surface
First Claim
Patent Images
1. A tuneable impedance surface for reflecting a radio frequency beam, the tunable surface comprising:
- (a) a ground plane;
(b) a first plurality of elements disposed in an array a first distance from the ground plane, the distance being less than a wavelength of the radio frequency beam; and
(c) a second plurality of elements disposed in an array a-second distance from the ground plane, the second plurality of elements being moveable relative to the first plurality of elements.
1 Assignment
0 Petitions
Accused Products
Abstract
A tuneable impedance surface for steering and/or focusing a radio frequency beam. The tunable surface comprises a ground plane; a first plurality of elements disposed in an array a first distance from the ground plane, the distance being less than a wavelength of the radio frequency beam; and a second plurality of elements disposed in an array a second distance from the ground plane, the second plurality of elements be moveable relative to the first plurality of elements.
-
Citations
26 Claims
-
1. A tuneable impedance surface for reflecting a radio frequency beam, the tunable surface comprising:
-
(a) a ground plane;
(b) a first plurality of elements disposed in an array a first distance from the ground plane, the distance being less than a wavelength of the radio frequency beam; and
(c) a second plurality of elements disposed in an array a-second distance from the ground plane, the second plurality of elements being moveable relative to the first plurality of elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of tuning a high impedance surface for reflecting a radio frequency signal comprising:
-
arranging a first plurality of spaced-apart conductive surfaces in an array disposed essentially parallel to and spaced from a conductive back plane, arranging a second plurality of spaced-apart conductive surfaces in an array disposed essentially parallel to and spaced from said conductive back plane by a distance greater than the distance said first plurality of spaced-apart conductive surfaces is spaced from said conductive back plane, and moving the second plurality of spaced-apart conductive surfaces relative to the first plurality of spaced-apart conductive surfaces. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A tuneable impedance surface for reflecting a radio frequency beam, the tunable surface comprising:
-
(a) a first substrate formed of a dielectric material having a thickness which is less than a wavelength of the radio frequency beam;
(b) a conductive plane disposed on a major surface of said first substrate;
(c) a first plurality of conductive elements disposed in an array on another major surface of said first substrate, wherein each element of the first plurality of elements has an outside dimension which is less than the wavelength of the radio frequency beam;
(d) a second substrate disposed (i) in a confronting relationship to said first substrate and (ii) relatively moveable to said first substrate; and
(e) a second plurality of conductive elements disposed in an array on said second substrate wherein each element of the second plurality of elements has an outside dimension which is less than the wavelength of the radio frequency beam. - View Dependent Claims (22)
-
-
23. A tuneable impedance surface for reflecting a radio frequency beam impinging the tuneable impedance surface, the tunable surface comprising:
-
(a) a ground plane;
(b) a first plurality of elements disposed in a two dimensional array a first distance from the ground plane, the distance being less than a wavelength of the radio frequency beam; and
(c) a second plurality of elements disposed in a two dimensional array a second distance from the ground plane, the second plurality of elements being disposed adjacent to and moveable relative to the first plurality of elements for changing a direction by which the radio frequency signal reflects from the high impedance surface. - View Dependent Claims (24, 25)
-
-
26. A method of tuning a high impedance surface for reflecting a radio frequency signal impinging the high impedance surface, comprising:
-
arranging a first plurality of spaced-apart, isolated conductive surfaces in a two dimensional array disposed essentially parallel to and spaced from a conductive back plane, arranging a second plurality of spaced-apart, isolated conductive surfaces in a two dimensional array disposed essentially parallel to and spaced from said conductive back plane by a distance greater than the distance said first plurality of spaced-apart conductive surfaces is spaced from said conductive back plane, and moving the second plurality of spaced-apart conductive surfaces relative to the first plurality of spaced-apart conductive surfaces in order to change a direction by which the radio frequency signal reflects from the high impedance surface.
-
Specification